@model int?
<select id="pagerowsize" name="pagerowsize" class="bquery">
    <option value="1" @((Model ?? 1) == 1 ? "selected" : "")>1건씩 정렬</option>
    <option value="10" @((Model ?? 10) == 10 ? "selected" : "")>10건씩 정렬</option>
    <option value="30" @((Model ?? 10) == 30 ? "selected" : "")>30건씩 정렬</option>
    <option value="50" @((Model ?? 10) == 50 ? "selected" : "")>50건씩 정렬</option>
    <option value="100" @((Model ?? 10) == 100 ? "selected" : "")>100건씩 정렬</option>
    <option value="200" @((Model ?? 10) == 200 ? "selected" : "")>200건씩 정렬</option>
</select>